Operation and maintenance manual

118 SEBU8601-01
Maintenance Section
Radiator - Clean
The coolant sys
tem and the hoses for the coolant
system are not usually supplied by Perkins. The
following text describes a typical method of replacing
coolant hoses
. Refer to the OEM information for
further information on the coolant system and the
hoses for the coolant system.
Pressurize
d System: Hot coolant can cause seri-
ous burns. To open the cooling system fille r cap,
stop the engine and wait until the cooling system
components
are cool. Loosen the cooling system
pressure cap slowly in order to relieve the pres-
sure.
1. Stop the engine. Allow the engine to cool.
2. Loosen th
e cooling system filler cap slowly in
order to relieve any pressure. Remove the cooling
system filler cap.
Note: Drain the coolant into a suitable, clean
container. The coolant can be reused.
3. Drain the coolant from the cooling system to a
level that is below the hose that is being replaced.
4. Remove the hose clamps.
5. Discon
nect the old hose.
6. Replace the old hose with a new hose.
7. Install the hose clamps with a torque wrench.
Note:
For the correct coolant, see this Operation and
Maintenance Manual, “Fluid Recommendations”.
8. Refil
l the cooling system. Refer to the OEM
information for further information on refilling the
cooling system.
9. Clean the cooling system filler cap. Inspect the
cooling system filler cap's seals. Replace the
coo
ling system filler cap if the seals are damaged.
Install the cooling system filler cap.
10. Sta
rt the engine. Inspect the cooling system for
leaks.
i02335774
Radiator - Clean
The radiator i
s not usually supplied by Perkins. The
following text describes a typical cleaning procedure
for the radiator. Refer to the OEM information for
further info
rmation on cleaning the radiator.
Note: Adjust the frequency of cleaning according to
the effects
of the operating environment.
Inspect the radiator for these items: Damaged fi ns,
corrosion
, dirt, grease, insects, leaves, oil, and other
debris. Clean the radiator, if necessary.
Personal injury c an result from air pressure.
Personal injury can result without following prop-
er procedure. When using pressure air, wear a pro-
tective
face shield and pro tective clothing.
Maximum air pressure at the nozzle must be less
than 205
kPa (30 psi) for cleaning purposes.
Pressurized air is the p referred method for removing
loose d
ebris.Directtheairintheoppositedirection
to the fan's air flow . Hold the nozzle approximately
6 mm (0.25 inch) away from the radiator fins. Slowly
move th
e air nozzle in a direction that is parallel with
the radiator tube assembly. This will remove debris
that is between the tubes.
Pressurized water may also be used for cleaning.
The maximum water pressure for cleaning purposes
must
be less than 275 kPa (40 psi). Use pressurized
water in order to soften mud. Clean the core from
both sides.
Use a degreaser and steam for removal of oil and
grease. Clean both sides of the core. Wash the core
wit
h detergent and hot water. Thoroughly rinse the
core with clean water.
If t
he radiator is blocked internally, refer to the OEM
Manual for information regarding flushing the cooling
system.
After cleaning the radiator, start the engine. Allow
the engine to operate at low idle speed for three to
fiv
e minutes. Accelerate the engine to high idle. This
will help in the removal of debris and the drying of
the core. Slowly reduce the engine speed to low idle
an
d then stop the engine. Use a light bulb behind
the core in order to inspect the core for cleanliness.
Repeat the cleaning, if necessary.